Shears.



H. MELGHIOR.

SHEARS.

APPLIOATION FILED MAY 1, 190e.

Patented Jan. 19, 1909'.

UNITED STATES PATENT OFFTCE.

HUGO MELOHIOR, OF OMAHA, NEBRASKA.

SHEABS.

No. 91o,oo8.

Specification of Letters Patent.

Patented Jan. 19, 1909.

Application filed MayV l, 1908. Serial No. 430,297.

--useful Improvements in Shears, of which the following is a speciication.

This invention relates to improvements in shears of the class provided with removable cutting blades, and has for one of its objects the provision of effective and reliable means for holding the blades upon the arms of the shears, and which will be durable in Wear. Means for these purposes heretofore shown, in some instances, depend upon the formation et' hol ingia11ges formed either upon the shear-arms or upon the cutting blades; in other instances the means for holding the blades depend upon the use of screws with counter-sunk heads, the same not being practical for use in connection with shears of light construction, since the cutting blades, upon this class must be as thinas possible, and since these screw-heads contact with the cutting blades, they also must have a light construction, and are, therefore liable to become broken.

ln the present invention, flattened rivet heads are used for a contact with the cutting blades, and the blades may, therefore be constructed extremely thin for use upon shears of smaller sizes.

Another object of the invention is to pro- Vide means whereby the blades may be quickly and conveniently removed, or.placed operatively upon the holding-arms.

The invention consists of the combination and arrangement of parts, as described herein, pointed out by the claim, and as illustrated by the accompanying drawing, wherein,-

Figure l is a side view of a pair of'shears` i., ith removable cutting-blades mounted thereon, 'embodyingl'my invention. Figs. 2`

and 3 are side views `of the cutting-blades shown in Fig. l, Figs. 4 and 5 are sectional views, respectively, nponlines a a and Z) of Fig. l, looking to the handle of the shears, these views being somewhat enlarged.v 6 is a side view showing a portion of a shear arm and blade, being a view taken between lines e e and f f of Fig. l, and enlarged to clearly show-relative position of parts. Fig. 7 is a sectional view taken between lines c c and dof Fig. 6 looking to the rivet-head, to clearly show the walls of the slot.

Referring now to thedrawing for a more particular description, numeral l 'indicates a pair of shears, the well knownV parts of which may be constructed of very cheap material, and for convenience, arms 2 and 3 may be considered as blanks, for the mounting thereon of cutting blades.

The pivot of the sheararms is indicated.

at. et, and I construct cutting blades 5 and 6, now to be described, and to be mounted upon the inner surfaces, respectively, of arms 2 and 3.

I provide rivets'7, secured to the shear arms, and having heads 8 projectinv from the plane of the inner walls of said shear arms, these rivet heads being for engagement with cutting blades 5 and 6, as will be explained.

l form slots 9 longitudinally of blades 5 and (3; at the end of each slot, nearest pivotapcrture l0 thereof, is provided an opening 11 through the blade, this opening being somewhat larger than the rivet head so that the latter may pass therethrough; the slot has a width less than that of the rivet-head, and by reason of the construction, the blades may be very quickly removed from or operatively placed upon thel shear-arms.

It will be understood that the distance apart of openings 1l of the blades, correspond with the distances from one of rivetheads S to another, upon arms 2 or 3, and to operatively place either of the cutting-blades upon its respective arm, the blade is seated upon the shear-arm so that openings 1 1 are passed by heads 8; the blade is then-moved lengthwise until aperture 10, near the end of the blade, is in alinement with screw or rivet 4 o f the shear-arms, and after arms 2 and 3 are secured by rivet il, the cuttingblade is held upon the arm upon which it has been placed, since a part of the blade is ,secured beneath the rivet-head. The con` blades, andl within slots 9. ARivet heads 8, .11;0

l portant. By reason of the threaded conned preferably, have their annular side walls l2 t formed outwardlyflaring toward their dat i ends, and walls il et i) are 'formed outwardly divi at 'troni' the inner to 'the outer sides ot' e blad so that the heads of the rivets mayA l Lrave an adequate bearing upon the blades, to hold them upon the arms.

As thus described, the ends ot the rivet heads are upon the same planes as the outer sides of cutting-blades 5 and G after these blades are mounted upon arms 2 and 3, and since these heads do not have the channels connnon to screwsheai'ls, they are less liable to breakage, than screws.

Rivets 7 may be held in arms 2 and 3 in any convenient manner, or may be formed. integral with the arms, it desired; and the blades may be used in connection with the heads of said rivets regardless as to how thel rivets are held, as is obvious. A good construction for holding the rivets, especially for shears of larger sizes is plainly shown in Figs. l, 4, 5 and G, and I have used the same to advantage. Apertures 14 are formed transversely through arms 2 and 6 to receive rivets 7, saidl rivets having longitudinal recesses 15 with 'threaded interior walls to engage eon'ipression members or screws it). Counter-sunk recesses i7 are formed upon the outer walls of the arms to receive the heads of screws 1G, although this feature is not iintion of said screws and rivets, blades 5 and t) may be pressed closely upon the arms, and this is particularly useful where the cutting blades are heavy; and in this construction the screw heads may be ot any desired size since they are used upon the outer wall ot the holding-arms. The advantage et this construction will be readily apparent. since screw-heads are not employed tor making contact with the cut-tingblades, and the weakness, heretofore pointed ont, et' such a construction, is avoided.

According to the construction as described` the cutting-blades `may be manufactured very economically; they may be very thin,

and this is desirable since high grade material is used; also slots t) may be readily forined without aid qt expensive machinery, and, as described, the parts are durable and the blades may be readilytakcn from or placed upon the holt'ling-arms. As is obvious, the number of slots t) upon blades 5 and (S and the corresponding projections or heads 8 ot the arms, need not be limited to the exact number shown and described; it willalso be seen that a blade could be held upon an arm by a single projection or rivet-head engaging the walls of a slot, provided rivet i of 'the shears traversed aperture l0, near the rear end of the blade; and it is equally truc that apertures l0 may be dispensed with as.

a holding means when two or more projections S upon the arms are employed in connection with slots t) of the blades.

Having 'fully described my invention, what claim as new and desire to secure by United States Letters Patent, is,-

in a device of the characterV described, the eon'ibinationwith a pair of pivotally mounted shear arms, ot a pair ot' cutting blades, each of said cutting blades having a keyhole 'slot termed therein and a two part binding` member lior binding said blades against said shear arms, one part; of said binding member comprising a bevel headed and internally threaded member and the other part ot said binding member comprising a headed screw adapted to enter said internally threaded member, said shear arni having an opening termed therein tor the passage of said binding member and having a shoulder against which the head ot said screw bears, the walls ot' the reduced portion ot the key hole slot being beveled to conform to the bcvcl head ot the internally*threaded member, the head ot said member lying tit-ish with the ontcr tace of the cutting blade, snbstantially as shown and described.

ln testimony whereot l have atiixed my signature in presence ot two witnesses.

ltllt() AiCliUIllUlt. Witnesses ilnmiu A. S'rURen-s, Geo. C. HENNINGS. 

